1. GRAIN SORGHUM WEED CONTROL UPDATE – 2017
Eric P. Prostko, Ph.D.
Professor and Extension Weed Specialist
Dept. Crop & Soil Sciences

2. GRAIN SORGHUM WEED CONTROL
Start clean!
Concep treated seed
Dual Magnum or Warrant (PRE)
Atrazine (POST) or Huskie + ATZ (POST)
Paraquat (Hooded sprayer)
Mechanical Cultivation

3. Weed Control in Grain Sorghum – 2016
NTC
Warrant (PRE)
Atrazine + COC (POST)
Dual Magnum (PRE)
Atrazine + COC (POST)
SG-02-16
May 27
51 DAP

4. Weed Control in Grain Sorghum – 2016
Dual Magnum – 16 oz/A (PRE)
Huskie – 13 oz/A (POST)
Atrazine – 16 oz/A (POST)
AMS (2.5% v/v)
NIS (0.25% v/v)
NTC
SG-02-16
May 27
51 DAP

5. Huskie Injury on Sorghum

6. Zest™ 75 WDG/Inzen™ Grain Sorghum
Dupont
Nicosulfuron (Accent)
NON-GMO
ONLY on Dupont Inzen™ traited grain sorghum
ADVANTA (Alta) Seed (???)
Limited performance data for SE
0.67 – 1.33 oz/A (75WDG)
Up to 20” tall sorghum
Tank-mix with atrazine
COC (1% v/v)
28% or 32% UAN (2 qt/A)
Dual, Warrant, or Cinch (PRE)
Concep treated seed
GA Label in November 2016

7. Weed Control in Inzen™ Sorghum - 2014
NTC
Dual II Magnum 16 oz/A – PRE
Zest 12 oz/A – 31 DAP
Atrazine 13.3 oz/A – 31 DAP
1% v/v – 31 DAP
SG-01-14
June 19
41 DAP

8. Weed Control in Inzen™ Grain Sorghum - 2016
NTC
Cinch 16 oz/A – PRE
Zest 12 oz/A – 33 DAP
Atrazine 32 oz/A – 33 DAP
1% v/v – 33 DAP
AMS 2.5% v/v – 33 DAP
SG-01-16
May 18
42 DAP

9. Zest Injury on Inzen Grain Sorghum
SG-01-16
May 18
9 DAT

10. Don’t Plant Sorghum in Fields Treated with Reflex in the same year!!!!

11. GRAIN SORGHUM – Harvest Aids
Initial moisture was 24.4%
Source: Olson et al. 2001

12. Sunflower Weed Control
Eric P. Prostko
Extension Weed Specialist

13. Sunflowers Acres in Georgia
FSA Crop Acreage Reports

14. What is labeled? (not much)
PPI
Sonalan or Treflan
PPI or PRE
Prowl, Dual Magnum, Spartan ($400/gal = 3-4 ozs/A)
POST
Arrow, Assure II, Select, Poast, SelectMax (grasses only)
Beyond (imazamox)
only on Clearfield hybrids
Beyond same family as Cadre, Pursuit, and Scepter
Beyond costs about $525/gal (4 ozs/A = $16.41/A)
$157/bag (200,000 seed ~ 10 acres) = $15.70/A
Clearfield sunflower hybrids are not GMO’s
Hooded Sprayer
Aim 1-2 oz/A + 1% v/v
Pigweeds must be 4” or less

15. Consider Cultivation

16. Clearfield Sunflower Weed Control Results
Clearfield sunflower hybrids that I have worked with since 2003
include the following:
Mycogen 8N429CL
Mycogen 8N386CL
Mycogen 8H419CL
Dekalb DKF 3880CL

17. 2004 (7 WAP)
NTC
Prowl 2 pt/A +
4 ozs/A (PRE)

18. 2006 (7 WAP)
Prowl 2.1 pt/A
Spartan 4.0 oz/A
PRE
NTC

19. Beyond @ 4 ozs/A + 80/20 + UAN (POST)
2004 (7 WAP)
Prowl 2 pt/A (PRE)
4 ozs/A + 80/20 + UAN (POST)
NTC

20. Beyond @ 4 ozs/A + 80/20 + UAN (POST)
2006 (7 WAP)
Prowl 2.1 pt/A
Spartan 4.0 oz/A
PRE
NTC
Prowl 2.1 pt /A (PRE)
4 ozs/A + 80/20 + UAN (POST)

21. Dual Magnum @ 1.33 pt/A (PRE) Beyond @ 4 ozs/A + 80/20 + UAN (POST)
2004 (7 WAP)
Dual 1.33 pt/A (PRE)
4 ozs/A + 80/20 + UAN (POST)
NTC

22. Harvest Aids for Sunflowers
Gramoxone (paraquat)
Roundup (glyphosate)
Sodium chlorate
Sharpen (saflufenacil)

23. Canola Weed Control

24. Canola Acres in Georgia
Source: FSA Crop Acreage Reports

25. Canola Weed Management
consider herbicide residues from previous crop
Optimum Planting Date/Fertility
Use Treflan if you can
Clearfield Canola + Beyond may be best overall legal option
Critical period for weed control in canola is 4 leaf stage (17-38 DAP)

26. Do not plant canola is fields treated this year with the following herbicides:
Reflex
Prefix
Staple (could plant Clearfield*)
Cadre (could plant Clearfield*)
Steadfast Q (maybe Clearfield*?)
Strongarm (maybe Clearfield*?)
Envive (could plant Clearfield*)
Classic (could plant Clearfield*)
Envoke (could plant Clearfield*)
Diuron (???)
*Some crop stunting may still likely occur.

27. Clearfield Canola (5525CL) Response to Reflex – 2015/2016
NTC
Reflex 8 oz/A
Reflex 4 oz/A
Reflex 2 oz/A
CAN-02-15
11/11/2015
30 DAT

28. Clearfield Canola (5525CL) Response to Strongarm – 2015/2016
NTC
Strongarm oz/A (PRE)
CAN-02-15
11/23/2015
42 DAT

29. Clearfield Canola (5525CL) Response to Strongarm – 2015/2016
Strongarm 84WG
@ oz/A (PRE)
CAN-02-15
11/11/2015
30 DAT

30. Current UGA Canola Weed Control Research
Howard F. Schwartz, Colorado State University, Bugwood.org

31. Henbit and Ryegrass Control?
** Command and Dual Magnum are NOT yet labeled for use in canola grown in GA. Research is underway to evaluate crop and weed response.

32. Canola Weed Control – 2015/2016 NTC Command 3ME @ 3.5 oz/A - PRE
11/11/2015
30 DAT

33. Canola Weed Control – 2015/2016 NTC Command 3ME @ 3.5 oz/A - PRE
11/23/2015
42 DAT

34. Command 3ME Injury on Canola - 2 WAT

35. Registration Status for Command
submitted required information to IR-4 Program in July 2013
Command received an A priority at IR4 – September 2015
IR-4 evaluating non US data for US tolerance.

36. Sesame Weed Control

37. Sesame Acres in Georgia
Source: FSA Crop Acreage Reports

38. Sesame Weed Control
The only herbicide registered for use in sesame in GA is Select Max. Select Max can be applied from 9-16 oz/A % v/v. Select Max should not be applied during flowering.
Dual Magnum is labeled in other states (TX + FL) but not Georgia. Currently, I have conducted only 3 sesame trials in GA. In 1 trial, I observed minimal injury from Dual. In 2 trials, I observed significant sesame stunting/death from Dual (wetter conditions).
More work on sesame is needed but there are not enough acres yet in GA to justify a large-scale effort on my part. For every sesame trial I conduct, that is one less peanut, soybean or corn trial that I can conduct.

39. Weed Control in Sesame - 2015
NTC
Dual Magnum 16 oz/A – PRE +
Direx 32 oz/A – POST (36 DAP)
0.25% v/v – POST (36 DAP)
Warrant 48 oz/A – PRE +
Direx 32 oz/A – POST (36 DAP)
0.25% v/v – POST (36 DAP)
SM-02-15
June 30
68 DAP

40. 19 DAT – Planted/Sprayed July 23
Sesame Demo – August 11, 2015
19 DAT – Planted/Sprayed July 23
7/ ” I
7/27 – 0.5” I
7/28 – 0.06” R
7/29 – 0.37” R
7/30 – 0.04” R
7/31 – 0.16” R
8/1 – 0.06” R
8/2 – 0.71” R
8/6 – 1.44” R
8/7 – 0.03” R
8/11 – 1.21” R
NTC
Dual
Magnum
16 oz/A
Warrant
48 oz/A
Direx
32 oz/A

41. Sesame Demo – September 9, 2015 48 DAT – Planted/Sprayed July 23
7/ ” I
7/27 – 0.5” I
7/28 – 0.06” R
7/29 – 0.37” R
7/30 – 0.04” R
7/31 – 0.16” R
8/1 – 0.06” R
8/2 – 0.71” R
8/6 – 1.44” R
8/7 – 0.03” R
8/11 – 1.21” R
Dual
Magnum
16 oz/A
NTC
Warrant
48 oz/A
Direx
32 oz/A

42. 77 DAT – Planted/Sprayed July 23
Sesame Demo – October 8, 2015
77 DAT – Planted/Sprayed July 23
7/ ” I
7/27 – 0.5” I
7/28 – 0.06” R
7/29 – 0.37” R
7/30 – 0.04” R
7/31 – 0.16” R
8/1 – 0.06” R
8/2 – 0.71” R
8/6 – 1.44” R
8/7 – 0.03” R
Dual
Warrant
Direx
Dual
Magnum
16 oz/A
NTC
Warrant
48 oz/A
Direx
32 oz/A

43. Sesame – 2016 Dual Magnum 7.64EC - PRE
11 oz/A
21 oz/A
43 oz/A
SESAME-01-16
June 24, 2016
43 DAT

44. Sesame – 2016 Dual Magnum 7.64EC - 3 DAE
11 oz/A
21 oz/A
43 oz/A
SESAME-01-16
June 24, 2016
38 DAT

45. QUESTIONS?